

package com.hazelcast.map.impl;

import com.hazelcast.cluster.Address;
import com.hazelcast.internal.partition.IPartitionLostEvent;
import com.hazelcast.internal.partition.PartitionAwareService;
import com.hazelcast.spi.impl.NodeEngine;
import com.hazelcast.spi.impl.eventservice.impl.EventServiceImpl;
import com.hazelcast.spi.impl.eventservice.impl.EventServiceSegment;

import java.util.Set;

/**
 * Defines partition-aware operations' behavior of map service.
 * Currently, it only defines the behavior for partition lost occurrences
 *
 * @see IPartitionLostEvent
 */
class MapPartitionAwareService implements PartitionAwareService {

    private final MapServiceContext mapServiceContext;
    private final NodeEngine nodeEngine;
    private final EventServiceImpl eventService;

    MapPartitionAwareService(MapServiceContext mapServiceContext) {
        this.mapServiceContext = mapServiceContext;
        this.nodeEngine = mapServiceContext.getNodeEngine();
        this.eventService = (EventServiceImpl) this.nodeEngine.getEventService();
    }

    @Override
    public void onPartitionLost(IPartitionLostEvent partitionLostEvent) {
        final Address thisAddress = nodeEngine.getThisAddress();
        final int partitionId = partitionLostEvent.getPartitionId();

        EventServiceSegment eventServiceSegment = eventService.getSegment(MapService.SERVICE_NAME, false);
        if (eventServiceSegment == null) {
            return;
        }
        Set<String> maps = eventServiceSegment.getRegistrations().keySet();

        for (String mapName : maps) {
            int totalBackupCount = nodeEngine.getConfig().getMapConfig(mapName).getTotalBackupCount();
            if (totalBackupCount <= partitionLostEvent.getLostReplicaIndex()) {
                mapServiceContext.getMapEventPublisher().publishMapPartitionLostEvent(thisAddress, mapName, partitionId);
            }
        }
    }

}
